Answer:
F = M2 ω^2 R centripetal force of sun on planet
ω = (F / (M2 R))^1/2 = 2 pi f = 2 pi / P where P is the period
P = 2 pi (M2 * R / F)^1/2
F = G M1 M2 / R^2 gravitational force on planet
P = 2 pi {R^3 / (G M1)]^1/2
P = 6.28 [(2.0E11)^3 / (6.67E-11 * 3.0E30)]^1/2
P = 6.28 (8 / 20)^1/2 E7 = 3.9E7 sec
1 yr = 3600 * 24 * 365 = 3.15E7 sec
P = 3.9 / 3.2 = 1.2 years
In a closed system, energy in form of heat (work) can be exchanged but not matter.
The answer to your question is C.
Hope it helped!
A). time taken =(2 * V * sin theta)/ g = 3.061 seconds.
b). Range = (v^2 * sin 2 theta)/g = 10.53 meters
It is actually B. Promoter 2.
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Answer:
Part a)
Part b)
Part c)
Explanation:
Part a)
As per energy conservation we can say
Energy stored in spring 1 = energy stored in spring 2
now we have
now from above equation
Part b)
To find the speed of the block we can say that its kinetic energy is gained due to spring energy
so we have
now we have
Part c)
When friction is present between two springs then we have energy loss due to friction force
so we have
now we have